Halo 3 (Xbox 360)

Halo 3 is the third game in the Halo Trilogy and provides the thrilling conclusion to the events begun in "Halo: Combat Evolved." Halo 3 picks up where "Halo 2" left off. The Master Chief is returning to Earth to finish the fight. The Covenant occupation of Earth has uncovered a massive and ancient object beneath the African sands - an object who's secrets have yet to be revealed. Earth's forces are battered and beaten. The Master Chief's AI companion Cortana is still trapped in the clutches of the Gravemind - a horrifying Flood intelligence, and a civil war is raging in the heart of the Covenant. This is how the world ends... [Bungie]

https://www.metacritic.com/game/xbox-360/halo-3